xref: /openbmc/u-boot/include/configs/rpi.h (revision 3aa4b703)
1 /*
2  * (C) Copyright 2012-2016 Stephen Warren
3  *
4  * SPDX-License-Identifier:	GPL-2.0
5  */
6 
7 #ifndef __CONFIG_H
8 #define __CONFIG_H
9 
10 #include <linux/sizes.h>
11 #include <asm/arch/timer.h>
12 
13 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
14 #define CONFIG_SKIP_LOWLEVEL_INIT
15 #endif
16 
17 /* Architecture, CPU, etc.*/
18 #define CONFIG_ARCH_CPU_INIT
19 
20 /* Use SoC timer for AArch32, but architected timer for AArch64 */
21 #ifndef CONFIG_ARM64
22 #define CONFIG_SYS_TIMER_RATE		1000000
23 #define CONFIG_SYS_TIMER_COUNTER	\
24 	(&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
25 #endif
26 
27 /*
28  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
29  * so 2708 has historically been used rather than a dedicated 2835 ID.
30  *
31  * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
32  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
33  * rather than obtaining a valid ID:-/
34  *
35  * For the bcm2837, hopefully a machine type is not needed, since everything
36  * is DT.
37  */
38 #ifdef CONFIG_BCM2835
39 #define CONFIG_MACH_TYPE		MACH_TYPE_BCM2708
40 #endif
41 
42 /* Memory layout */
43 #define CONFIG_NR_DRAM_BANKS		1
44 #define CONFIG_SYS_SDRAM_BASE		0x00000000
45 #ifdef CONFIG_ARM64
46 #define CONFIG_SYS_TEXT_BASE		0x00080000
47 #else
48 #define CONFIG_SYS_TEXT_BASE		0x00008000
49 #endif
50 #define CONFIG_SYS_UBOOT_BASE		CONFIG_SYS_TEXT_BASE
51 /*
52  * The board really has 256M. However, the VC (VideoCore co-processor) shares
53  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
54  * smaller amount of RAM is present in order to avoid stomping on the area
55  * the VC uses.
56  */
57 #define CONFIG_SYS_SDRAM_SIZE		SZ_128M
58 #define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + \
59 					 CONFIG_SYS_SDRAM_SIZE - \
60 					 GENERATED_GBL_DATA_SIZE)
61 #define CONFIG_SYS_MALLOC_LEN		SZ_4M
62 #define CONFIG_SYS_MEMTEST_START	0x00100000
63 #define CONFIG_SYS_MEMTEST_END		0x00200000
64 #define CONFIG_LOADADDR			0x00200000
65 
66 /* Devices */
67 /* GPIO */
68 #define CONFIG_BCM2835_GPIO
69 /* LCD */
70 #define CONFIG_LCD_DT_SIMPLEFB
71 #define CONFIG_VIDEO_BCM2835
72 
73 #ifdef CONFIG_CMD_USB
74 #define CONFIG_USB_HOST_ETHER
75 #define CONFIG_USB_ETHER_SMSC95XX
76 #define CONFIG_TFTP_TSIZE
77 #define CONFIG_MISC_INIT_R
78 #define CONFIG_SYS_USB_EVENT_POLL
79 #endif
80 
81 /* Console UART */
82 #ifdef CONFIG_BCM2837
83 #define CONFIG_BCM283X_MU_SERIAL
84 #else
85 #define CONFIG_PL01X_SERIAL
86 #endif
87 
88 /* Console configuration */
89 #define CONFIG_SYS_CBSIZE		1024
90 #define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE +		\
91 					 sizeof(CONFIG_SYS_PROMPT) + 16)
92 
93 /* Environment */
94 #define CONFIG_ENV_SIZE			SZ_16K
95 #define CONFIG_ENV_VARS_UBOOT_CONFIG
96 #define CONFIG_SYS_LOAD_ADDR		0x1000000
97 #define CONFIG_PREBOOT			"usb start"
98 
99 /* Shell */
100 #define CONFIG_SYS_MAXARGS		16
101 #define CONFIG_CMDLINE_EDITING
102 
103 /* ATAGs support for bootm/bootz */
104 #define CONFIG_SETUP_MEMORY_TAGS
105 #define CONFIG_CMDLINE_TAG
106 #define CONFIG_INITRD_TAG
107 
108 #include <config_distro_defaults.h>
109 
110 /* Environment */
111 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
112 #define ENV_DEVICE_SETTINGS \
113 	"stdin=serial,usbkbd\0" \
114 	"stdout=serial,vidconsole\0" \
115 	"stderr=serial,vidconsole\0"
116 
117 /*
118  * Memory layout for where various images get loaded by boot scripts:
119  *
120  * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
121  *
122  * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
123  *   binary firmware loads a DT to address 0x100, so we choose this address to
124  *   match it. This allows custom boot scripts to pass this DT on to Linux
125  *   simply by not over-writing the data at this address. When using U-Boot,
126  *   U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
127  *   and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
128  *
129  * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
130  *   something else. Put it low in memory to avoid conflicts.
131  *
132  * kernel_addr_r must be within the first 128M of RAM in order for the
133  *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
134  *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
135  *   should not overlap that area, or the kernel will have to copy itself
136  *   somewhere else before decompression. Similarly, the address of any other
137  *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
138  *   this up to 16M allows for a sizable kernel to be decompressed below the
139  *   compressed load address.
140  *
141  * scriptaddr can be pretty much anywhere that doesn't conflict with something
142  *   else. Choosing 32M allows for the compressed kernel to be up to 16M.
143  *
144  * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
145  *   for any boot script to be up to 1M, which is hopefully plenty.
146  */
147 #define ENV_MEM_LAYOUT_SETTINGS \
148 	"fdt_high=ffffffff\0" \
149 	"initrd_high=ffffffff\0" \
150 	"fdt_addr_r=0x00000100\0" \
151 	"pxefile_addr_r=0x00100000\0" \
152 	"kernel_addr_r=0x01000000\0" \
153 	"scriptaddr=0x02000000\0" \
154 	"ramdisk_addr_r=0x02100000\0" \
155 
156 #define BOOT_TARGET_DEVICES(func) \
157 	func(MMC, mmc, 0) \
158 	func(USB, usb, 0) \
159 	func(PXE, pxe, na) \
160 	func(DHCP, dhcp, na)
161 #include <config_distro_bootcmd.h>
162 
163 #define CONFIG_EXTRA_ENV_SETTINGS \
164 	"dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
165 	ENV_DEVICE_SETTINGS \
166 	ENV_MEM_LAYOUT_SETTINGS \
167 	BOOTENV
168 
169 
170 #endif
171